You guys stole my idea! Only I was thinking of an actual full base not out riggers. A solid piece of wood that could be have routered edges and stained to match the speaker finish.

I had contemplated bolting the M22 to the top of the M60 using the threaded inserts to prevent the M22 from falling off the top if bumped into.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70